WeCo 5K3-LV-HV
HeSU 5K3-LV HV
Page 35 of 69
V_1.1_21-Nov-2020_LV-HV
Weight: 8kg
2.8.2 Control Logic and Protection Limit
The inverter, if has the functions must be set with the below restrictions in addition to the BMS control logic
MAX CURRENT WITH BUS BAR
CURRENT SETTING / BMS CURRENT LIMIT
Clusters
1
2
3
4
5
Batteries
1
---
189
252
336
420
2
189
340
454
605
680
3
252
454
544
645
800
4
294
529
564
753
800
5
367.5
595
800
800
800
INVERTER LIMITS
CURRENT: as per this chart
HIGH VOLTAGE 57,7 Vdc
LOW VOLTAGE 50,5 Vdc
LOW VOLTAGE 48,5 V
1.
The charge current will be limited to 0A when the single module voltage has been reached 57.8V.
2.
The discharge current will be limited to 0A when the single module voltage has been discharged to 50.4V.
3.
The battery system will communicate with the inverter to limit the current.
4.
Each battery will be protected by the same logic separately as per single module protection concept.
5.
If some modules, individually will reach any fault status the single module will protect and disconnect from the system in
less than 3 seconds.
6.
The current limit must be adjusted according to the real active batteries in system in order to restore the normal function.
7.
If the cluster is not balanced, the current limitation set from the HUB to the inverter will be sent in order to manage the
rest of active modules and clusters, in the same time the imbalanced modules or cluster will equalize in standby mode and
will reconnect once in the normal range.
8.
If there is more than 2 batteries in one cluster are in protection mode, the entire cluster will protect by shutting down.
9.
If there is more than 2 cluster in protection mode, the full system will protect.
10.
The battery sends information to the inverter to limit the charge/discharge current to zero Amps if the battery is detecting
an over current.
11.
Current limit protection cycle allows an automatic reconnection for three times, above that is necessary a manual restart
check, a prior a full system control is mandatory.
12.
If the current of one cluster is larger than the current limit, the battery system send a warning according with the single
module BMS logic
13.
If the warning does not recover in 5 minutes, the cluster will shut down and a manual reconnection is required prior a full
system control.
